Well, this is all very interesting. I'm just wondering as I'm not that
up on HD radio anyways a couple of things:

First of all, if AM is mostly talk - as it is now -- what is the audio
difference offered by HD?

And secondly, if the stations are using parts of other band widths to
pull this off -- at least in populated markets - like LA, Chicago and
New York -- isn't HD going to be a nightmare for the FCC. It was bad
enough just trying to protect AM Clear Channel stations when the sun
goes down. How on earth will the FCC ever be able to govern all of
this - not mention the engineering nightmare it will cause?? But then
I'm not an engineer, maybe it's not as bad as it seems.